Printing mechanism for type-writers.



PATENTED JULY 17, 1906. J. B. HAMMOND. PRINTING MECHANISM FOR TYPE WRITERS;

APPLICATION FILED MAR.24.1905.

,Zwav'roe. ames P l /Rrnvflonc/ JAMES B. HAMMONDQOF NEW YORK, N. Y.

PRINTING MECHANISM FOR TYPE- WFHTEFiS- Specification of Letters Patent Application filed March 24. 1905. Serial lie. 251335- Patented July 7. 1906.

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Be it known that I, JAMES B. HAMMOND, a citizen of the United States, residing at Sixty ninth street and East River, liew York, N. Y., have inventedcei'tain new and useful Improvements in Printing Mechanism for Type- Writers, of which the following is a specification.

My invention relates to type-writers ofthe class in which the characters are carried by a wheel or similar rotary element; and it consists in the features and combination and arrangement of parts hereinafter described,

' and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view of the printing elements of a typewriter embodying my invention. Fig. 2 is a central vertical sectional View of Fig. 1. Fig. 3 is a view of a detail.

My invention concerns more particularly the means for retaining in place the rotary shuttle or wheel carrying the characters. This rotary shuttle is in the form of a continuous ring 1, having a flan e 2 at its upper edge extending continuous y around the same, the said flange resting upon the u per edge of an anvil 3, which is suitably eld upon a center-post 4. Antifriction bearings or balls may be interposed, as at 5, between the flange of the shuttle and the upper edge of the anvil. The shuttle cooperates with a hammer, (indicated at 6,) which, as in the ordinary Hammond type-writer, is provided with a plurality of faces, any one of which may be brought into cooperative relation with the shutt e.,

In order to holl l the s uttle in place on the anvil, 1 provide retai; consisting of bars 7, supported on the up er edge of the crossarlns 8 of the anvil, to which the said bars .areheld by screws 9, passing down through slots 10 in the said bar. The bars have crossarms at their ends, as shown at 11, and these arms are in turn provided with ranged in diver ent relation an reaching over the inner e ga of the continuous flange oi the shuttle. At their inner ends the arms or bars 7 are turned upwardly and thence curved outwardly, as at 13, whereby they may be manipulated. In order to remove the shuttle, it is simply necessary to grasp the ends 13 of the bars 7 and press them inwardl y toward each other, thus withdrawing the. overlyin" fingers 12 from the shuttle- .llnngo, and then the entire shuttle may be lifted from the machine. This effect is also fingers 12, ar-.

rendered possible because the shuttle-arm 14 common in this class of machines hasjits upturned end 15 engaging in a notch 16in the in-wardly extending flange, this construction offering no resistance to the free removal of the shuttle. In order to place the shuttle in position and retain it,- it is simply necessary to drop it down'upon the anvil, so that its continuous flange will rest upon the upper edge thereof or upon the ball-bearings carried thereby, and then by pressing the finger down between the outwardly-curved ends 13'of the bars 7 the said bars will be pressed apart, and the fingers 12 willbe thrust over the flange of the shuttle, and thus the shuttle will be. retained against vertical displace ment.

' In order to hold the anvil on the center- 7 postagainst vertical displacement, I provide a vertical-extending rod 17, extending up from a part of thie'machine and having an inwardly-ektending arm-18, engaging agroove or kerf in the side of the anvil-arm, as at 19 in Fig. 2. This inwardly-extending arm18 is provided with a'bentend 20, Fig. lfan'du when the anvil is t'o'b'e removed this arm can be swung aside in the'direction of the arrow," Fig. 1, to .thus remove it from the kerf 19, whereupon the anvil may be removed vertically. The shuttle being of continuous ring form carries a plurality of sets of characters, and I have indicated these at a, b, and 0. Those at a are ada ted for use in writing Braille and consist oi projections having .pits formed therein adapted to cooperate with points carriedbythe hammer in a vertical row and one of Which is shown at (1, Figs. 1 and 3. This arrangement for printing Braille I have improved by.forming a shoulder on the hammer at e, surrounding the point and adapted to cooperate Withthe edge of the pit and limit the entrance of the point into the pit, so that the paper will be embossed Without being unctured. The relation of the arts is suc that the shoulder e will properly limit the entrance of the point into the pit, and thus prevent puncturing of the paper.-

I claim as my invention 1. In a type-writer, the combination of an anvil of ring shape, a ring-shaped shuttle having a flange at its extreme upper edge overlying the upper edge of the anvi a shuttle-arm within the anvil engaging said fian e to operate the shuttle, and a retainer reac ing over the flange of the shuttle and adjustable to and from, said position to permit mit the removal and replacing of the shuttle the removal and replacing of theshuttle by tle by a vertical movement, substantially as ia-vertical movement, substantially as dedescribed. I scribed. r 4. In combination, an anvil, a ring-shaped 2. In a type-writer, the combination of an shuttle and a pair of retainers movable raanvil of ring shape, a ring-shaped shuttle dially outward to overlie the shuttle to hold having a flange at its-extreme upperedge the same in place and movable radially inoverlying the upper edge of the anvil, a shutward to permit the removal ofsaid shuttle tle-arm within the anvil engaging said flange vertically, substantially as described. to operate the shuttle, and a retainer reach- 5. In combination, an anvil, a ring-shaped in over the flange of the shuttle and adj ustshuttle and a pair of retainers movable raab eradially to and from said position to perdially outward to overlie the shuttle to hold the same in place and movable radially inward to permit the removal of said shuttle vertically, said retainers having finger-pieces at their inner ends extending upwardly, substantially as described.

In testimony whereof in presence of two witnessesv JAMES B. HAMMOND:

by a vertical movement, substantially as described. 3. In a type-Writer, the combination of an anvil of-ring shape, a ring shaped shuttle, a shuttle-arm Within the anvil-engaging part of the shuttle to operate the same and a retainer reaching over the upperedge of the anvil and over the upper part of the shuttle and adjustable to and from the said position to permit removal and replacing of the shut- Witnesses: E. JJECKLIN,

JOHN M. BANCROFT.

I affix my signature 

